I think we need only look at history. The nuclear power industry has a terrible record of construction costs overruns and not factoring decommission costs.

To get such projects up and running, it almost seems underestimating construction costs is the way to get public approval. When the project is half built, there really is no turning back. Had we used more truthful figures, our electricity systems would look much different.

Decommissioning costs are negligible at the start of the project. Financial analysis techniques (discounting cash flows) set the expenses of 30 years from now next to 0.